Syntheses and Structures of [n]Cyclophenacenes and Related Carbon Nanobelts

本研究由化学系化学合成研究计划资助，西弗吉尼亚大学化学系的Wang正在开发有效的合成路线，使用有机反应来构建碳纳米带，作为碳纳米管的重复带状部分。目前对碳纳米带的兴趣部分是由于使用它们作为生长碳纳米管的模板的可能性，碳纳米管在微电子和纳米技术中具有重要意义。 这种合成方法在生产具有均匀直径和碳六边形取向的碳纳米管方面提供了优于现有经验方法的潜在优势，这两个因素对于先进制造中的应用至关重要。 个性化的教育和指导计划是为每个研究生或本科生谁参加这项研究。训练有素的合成化学家的发展增加了化学工业的人力资源。 功能化碳纳米带是生长均匀直径和手性碳纳米管的潜在模板。它们还显示出独特的尺寸依赖性光电和氧化还原特性。Diels-Alder反应用于制备大环化的关键前体，从而产生碳纳米带。Diels-Alder反应的高立体选择性和多功能性可以方便地获得各种带状结构。具有新结构特征和官能团的1，4-二芳基-1，3-丁二烯的合成途径被开发用于与亲二烯体的环加成，以允许碳纳米带的主要组分的容易组装。这些功能团还可以作为铰链，将两个功能化碳纳米带单元连接在一起，形成更好地模仿碳纳米管的结构。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

In this project, funded by the Chemical Synthesis Program of the Chemistry Division, Professor Kung K. Wang of the Department of Chemistry at West Virginia University is developing efficient synthetic routes using organic reactions for the construction of carbon nanobelts as repeating belt-like segments of carbon nanotubes. The current interest in carbon nanobelts is due, in part, to the possibility of using them as templates for growing carbon nanotubes which are of significant importance in microelectronics and nanotechnology. This synthetic approach offers the potential advantage over the existing empirical methods in producing carbon nanotubes with uniform diameter and orientation of the carbon hexagons, two factors of critical importance for applications in advanced manufacturing. Personalized educational and mentoring program is developed for each graduate or undergraduate student who participates in this research. Development of well-trained synthetic chemists adds to the human resources for the chemical industry. Functionalized carbon nanobelts are potential templates for growing carbon nanotubes of a uniform diameter and chirality. They have also been shown to exhibit unique size-dependent optoelectronic and redox properties. The Diels-Alder reactions are used to prepare key precursors for macrocyclization leading to carbon nanobelts. The high stereoselectivity and versatility of the Diels-Alder reaction could provide easy access to a variety of belt-like structures. Synthetic pathways to 1,4-diaryl-1,3-butadienes with new structural features and functional groups are developed for cycloaddition with dienophiles to allow for the easy assembly of major components of carbon nanobelts. The functional groups could also serve as hinges to connect two units of functionalized carbon nanobelts together to form structures that could better mimic those of carbon nanotubes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.